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Thunderclap headache is a medical emergency presented as the worst headache ever, is characterised by an abrupt onset and maximal intensity within seconds to minutes. However, cerebrovascular causes are among the most common causes of thunderclap headache, and other non-vascular life-threatening aetiologies should be considered in evaluating a patient. We describe a 23-year-old previously healthy Latino woman who presented to our hospital after a month of repetitive severe, abrupt-onset headaches. Her prior medical history was unremarkable. After a normal brain MRI with angio-MRI, a lumbar puncture was performed with normal opening pressure, hypoglycorrhachia, increased proteins and a leucocyte; India ink staining was positive for encapsulated yeast, cultures were positive for

Thunderclap headache is a medical emergency presented as the worst headache ever, is characterised by an abrupt onset and maximal intensity within seconds to minutes. However, cerebrovascular causes are among the most common causes of thunderclap headache, and other non-vascular life-threatening aetiologies should be considered in evaluating a patient. We describe a 23-year-old previously healthy Latino woman who presented to our hospital after a month of repetitive severe, abrupt-onset headaches. Her prior medical history was unremarkable. After a normal brain MRI with angio-MRI, a lumbar puncture was performed with normal opening pressure, hypoglycorrhachia, increased proteins and a leucocyte; India ink staining was positive for encapsulated yeast, cultures were positive forCryptococcus gattii. The patient received appropriate antifungal treatment with a good response. This case highlights the particular presentation of cryptococcal meningitis due toC. gattiiamong immunocompetent patients.